Three-Dimensional Nonlinear Finite Element Analysis of Hot Radial Forging Process for Large Diameter Tubes
Three-Dimensional Nonlinear Finite Element Analysis of Hot Radial Forging Process for Large Diameter Tubes
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DOI：
10.1080/10426910903536790
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发表时间：
2010-07
影响因子：
4.8
通讯作者：
J. Chen;K. Chandrashekhara;V. Richards;S. Lekakh
中科院分区：
文献类型：
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作者：
J. Chen;K. Chandrashekhara;V. Richards;S. Lekakh
开发了非线性耦合有限元模型来预测大直径管在热径向锻造过程中承受机械和热载荷的行为。该模型是在三维 (3D) 框架中制定的，以考虑轴向和周向效应。该模型考虑了材料和几何非线性。速率相关材料模型用于描述工件在高温和大应变下的粘塑性行为。使用商业有限元代码对内部有芯轴、外部有四个锻造模具的管状工件进行建模。开发并实现了一个子程序来简化径向锻造仿真的建模过程。给出的数值结果包括变形工件沿轴向和环向的残余应力、塑性应变和温度分布。还提供了接触力的结果，以评估锻造过程中模具的性能。将有限元模型预测与文献中提供的实验结果和二维 (2D) 轴对称模拟结果进行比较。使用开发的 3D 模型对热径向锻造工艺进行了各种案例研究。
A nonlinear coupled finite element model is developed to predict the behavior of large diameter tubes subjected to mechanical and thermal loadings during hot radial forging process. The model is formulated in a three-dimensional (3D) framework to account for both axial and circumferential effects. This model considers both material and geometric nonlinearities. A rate-dependent material model is used to describe the viscoplastic behavior of the workpiece subjected to high temperature and large strain. A tubular workpiece with the mandrel inside and four forging dies outside is modeled in commercial finite element code. A subroutine is developed and implemented to simplify the modeling process for radial forging simulation. Numerical results presented include residual stress, plastic strain, and temperature distribution along the axial and hoop directions in the deformed workpiece. Results are also presented for contact force to evaluate the performance of the die in the forging process. Finite element model predictions are compared with experimental and two-dimensional (2D) axisymmetric simulation results available in literature. A variety of case studies are conducted for hot radial forging process using the developed 3D model.